William is the Director General of the Guernsey Financial Services Commission. He served on the Executive Committee of the International Association of Insurance Supervisors (IAIS) between 2014 and 2022 where he chaired both the Audit and Risk Committee and the Standards Assessment Working Group, establishing IAIS's regulatory assessment programme. He has a strong interest in Supervisory Technology and Green Finance. Under his leadership, the Commission has developed:
- the Guernsey Green Fund framework (2018), and the Natural Capital Fund framework (2022), both possibly global firsts in environmental finance;
- brought into force environmentally sensitive green capital rules for life insurers - possibly another world first for insurance regulation; and
- made moves, including planting 53,000 trees in 2022 in an ecologically advantageous fashion, towards becoming a net zero regulator.
Prior to becoming a financial regulator, William worked in the UK Cabinet Office where he helped write "Regulation - Less is More, a report to the Prime Minister". His other publications include: "Freedom for Public Services; The Costs of Regulation and PRISM Explained - Implementing Risk Based Supervision". Earlier in his career, William gained private sector experience working for an international energy firm on three continents, and a US strategy house, Monitor Group. He also served as a volunteer police officer in London, and as a school governor in a deprived neighbourhood. William has also held public office as both a parish and district councillor.
From 2006 to 2010, William supervised large insurers and investment firms at the UK FSA where he was also asked to lead an emergency credit institutions team during the Global Financial Crisis. In 2010, he moved to become Head of Risk at the Central Bank of Ireland where he reinvented Irish financial services supervisory processes as the country recovered from the Euro crisis. He subsequently played an influential role in the operational design of the European Central Bank's banking union; it adopted the software that he had designed to implement its supervisory operating model.